We want to test the hypothesis that at least 85% of drivers on a freeway violate the speed limit. In a random sample of n = 1,100 vehicles, 83%…

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We want to test the hypothesis that at least 85% of drivers on a freeway violate the speed limit. In a random sample of n = 1,100 vehicles, 83% violated the speed limit. Compute the test statistic.

State the null and alternative hypotheses and the decision rule.

Use α = 0.05.

a) TS =1.85     Reject H₀. The proportion of violators is less than 0.85.

b) TS =1.85     Do not reject H₀. The proportion of violators is not less than 0.85.

c) TS =1.45     Do not reject H₀. The proportion of violators is not less than 0.85.

d) TS =1.45     Reject H₀. The proportion of violators is less than 0.85.

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